Year	% of total merchandise exports
1960	4.102319163615135
1962	5.448816951874962
1963	4.340803553401979
1968	1.027386492265124
1969	1.5168049591579764
1970	1.1028135885142865
1971	1.1292974461379164
1972	0.9815687759823672
1973	1.5135223644352265
1974	1.624174460807666
1975	1.1314070384279007
1976	1.4011088844959732
1977	1.389019749954702
1978	1.3203368607134967
1979	1.578919771104174
1980	1.0467742117515733
1981	0.7831808043604197
1982	0.5258649043499545
1983	0.5477224909145558
1984	0.6293636388420965
1985	0.5568452747595253
1986	0.6208001443741838
1987	0.62435173226864
1988	0.6108587071586067
1989	0.5252041877365681
1990	0.45886335852843346
1991	0.5596309948436616
1992	0.7017239317098026
1993	0.9369811762118889
1994	0.7711310691859045
1995	0.7683505768228506
1996	0.9304390736244159
1997	0.9879391033452148
1998	0.9880665835127145
1999	0.9971599721726476
2000	0.9793963352795445
2001	1.033125110403362
2002	0.9734351072920243
2003	0.706890750470098
2004	0.772197343827847
2005	0.9398202491886122
2006	0.9668261917709565
2007	0.9203043467217443
2008	1.1088437565932752
2009	1.0936346369439014
2010	0.8906605389541088
2011	1.1318755830255154
2012	0.7953215353862751
2013	1.0251723152656773
2014	0.7990840859323562
2015	0.8581037442039086
2016	0.8317982816311356
2017	0.8160747474499134
2018	0.693376057593119
2019	0.8452756228596
2020	0.8390309574176158